Question 1. What Are The Features Of Commvault?
CommVault software program delivers get admission to, safety and sharing for e facts reliably, securely and value efficiently whether or not inside the filed, remote website online or important workplace.
Enhance productivity with at ease record sync and percentage
Reduce Risk, limit facts leakage, enhance data availability and meet compliance necessities
Simplify Administration with one robust answer for computing device, pc and server information
Lower the price of protection far off and mobile information
Access blanketed statistics from anywhere
Question 2. What Are Commserve Dr Procedures?
Hardware Fresh: Copy DR Set to Stand by way of commserve and carry out Restore the CS DR set to satand by means of CS.
DR set may be restored in 2 approaches.
Install Commserve software and perform repair the use of commserve Disaster Recovery tool GUI. And later perform Name alternate or
During Commserve Installtion, Perform Dr Restore from Existing backup.
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Question three. What Is A Storage Policy?
Storage friends the customer Backup to storage Disk or Tape Library. In that reproduction coverage is used to set Retention.
Question four. What Is Global Dedup Storage Policy?
The international deduplication policy permits deduplication across more than one garage regulations that uses a common set of disk libraries and deduplication database (DDB).
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Question 5. What Are The Types Of Copies And What Are They?
There can be best one Primary Copy and Different styles of AUXILARY/SECONDARY. The styles of copies are.
Selective Copy: A selective copy lets in you to copy specific complete backup jobs from a source replica, the source replica may be either a number one or a synchronous replica. Selective reproduction facilitates higher tape rotation.
Inline replica: Here Both Primary and Secondary copy are written to storage throughout Backup Phase itself. Incase if the secondary garage doesn’t have sufficient space then backup will fail.
Synchronous reproduction: In synchronous reproduction all facts of primary is copied.
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Question 6. What Are The Other Ways Of Doing High Availability?
Clustering at SQL Level.
Question 7. How To Move The Ddb To The New Media Agent?
Right-click the mount course, and then click on Share Mount Path. Factor to new Media Agent. Set it to dafault mount Path. If it's far a Tape Library configure tape lib and change datapath.
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Question eight. What Is Intellisnap?
It takes a photograph, and then resumes live operations. IntelliSnap backup works in conjunction with storage arrays to provide picture capability for backup.
Question 9. What Is The Use Of The Proxy Server?
you can use a proxy server to lessen the burden on the production server. The backup copy operation makes use of the proxy to move the snap to backup media.
The Storage array is accessed to create a image.
The snapshot is set up on the ESX server specified for the snap mount.
The snapshot is unmounted.
During the Backup Copy operations:
The picture is hooked up to the ESX server distinct for the snap mount.
The mounted photograph is handled like document device and the required contents are study.
The file device backup is performed to Primary Copy of the garage policy.
When the backup replica process is finished, the picture is unmounted.
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Question 10. What Are Your Day To Day Activities As Backup Admin?
It starts with monitoring the present day jobs walking in Job controller, Make positive that No task have to be in pending & Waiting kingdom with out a valid Reason. Also check for suspended and queued Jobs. Take a look at if any of the process has got put off motives, Also take a look at for the Jobs which are walking for extra than 24 hours. Below are a number of the fitness test duties.
Check for Media agent, Tape Library(Including Tape Drives) / Disk Library status ensure that none of them are offline.
Check for the Free area to be had for Disk Libraries, Index Cache and DDB Paths (Preferable schedule a customized Report for these activites)
Extract a backup Report for Failed, Completed with Errors, completed Warnings and Killed jobs (test and act therefore).
You may additionally check for Deployment, Decommission, Restores and many others if any in ticketing tool.
Question 11. Can You Tell Me About Your Infrastructure ?
You need to in short describe about your backup infrastructure and every day activities, for instance
We have n(1) Prod commserve m(1) DR/Standy Commserve and n(10-20) pair of Media Aegents and we backup round n(2000) servers which includes Regular report gadget, Databases like (SQL, Oracle, Exchnage, SAP Oracle, DB2, SAP DB2 etc...). This additionally includes VMWare photograph backups (VADP/VCB) / intelli snap. Include all the backups which you carry out on daily basis. For Storage we've got HUS 150 or HNAS with a complete capability of N(TB)
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Question 12. What Are The Common/regular Backup Failures ?
Some of the common or frequent backup troubles are:
Network Communication difficulty
Client offerings is probably down
Media agent Offline
Destination Disk Library ful
Data Path offline
VSS photo backup failure
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Question thirteen. How To Use Only Specific Set Of Tapes For A Server Backup Or For A List Of Server Backup?
Create a new scratch pool and flow the required media to new scratch pool and you can set at subclient which scratch pool to be used. You can additionally do that at storage policy, reproduction coverage level.
Question 14. What Is Difference Between Synthetic Full & Full Backup & Dash Full?
Synthetic full backup consolidates all the incremental backups for the reason that ultimate complete and appends to make it a complete backup. Here the server (Client machine and network utilzation is aslo very low as compared to everyday full ). Whereas Full backup is a entire full backup taken from server. And Dash complete performs copies the specific blocks of the de-duplicated facts and updates the DDB and index documents to make it a complete backup.
Question 15. What Is Silo (de-duplication To Tape)?
De-duplicated statistics is copied to tape after the number one de-duplication on Disk this is configured on international-dedup Storage coverage.
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Question 16. What Is Hash Algorithm?
Hash algorithm is carried out on block of statistics after it is read from customer machine and a completely unique signature is generated which is used to carry out De-duplication.
Question 17. What Is The Default Block Size Set For De-duplication Enabled Storage Policies?
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Question 18. What % Of De-dup Ratio Were You Able To Maintain.?
For File gadget backups its above ninety% and Database backups 70% - 95%
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Question 19. Explain How Vmware Backups Works ?
Vmware snapshots backups are done using Proxy server. On proxy server VSA (Virtual Server Agent) software is hooked up. Commvault communicates thru Vcenter. Where a image of VM is executed and it's far mounted in Proxy server. From proxy the image image is backedup to media agent.
Question 20. What Are Different Types Of Transport Modes In Vmware Backup And Their Usage?
Transport modes is used to decide which technique to be used to mount the photo in proxy.
Transport Mode SAN (storage area network) - SAN mode is supported for at once linked storage. The VSA must have get entry to to the datastore LUNs that provide storage for VM disks. Data is read at once from the storage in which VM resides. Without going through the ESX host or transferring facts over the neighborhood area community (LAN). The ESX host is contacted handiest to coordinate get right of entry to to the LUN.
HotAdd In HotAdd mode, the Virtual Server Agent is hooked up on a VM residing on an ESX Server. In HotAdd mode, the information volumes containing the VMs to be subsidized up are robotically established to the proxy, so that they may be accessed with the aid of the proxy as a neighborhood disk.
Local Area Network (NBD and NBDSSL) NBD (community block tool) & NBDSSL (encrypted NBD) transmit records over the TCP/IP connection between the ESX server and the proxy pc.
NBDSSL is just like NBD mode, but information switch between the proxy pc and the ESX server is encrypted.
Question 21. How You Configure A Cluster Backup?
Create a cluster organization and upload the consumer machines in it and carry out a sync, For home windows throughout Commvault consumer software instaltion. It activates for installtion on passive node(for windows). Perform installation and schedule backup.